毛苕是我省棉花、早秋的优良绿肥。过去推广品种主要是普通毛苕,生长慢,返青迟,冬前、早春产草量均较低,而4月上旬至5月上旬生长最快,但与棉花播期有一定矛盾。如翻压期距棉花播种期太近,由于绿肥分解过程中产生大量二氧化碳,窒息棉籽发芽,缺苗严重。因此急需选育早发丰产毛苕新品种,以提高冬前、早春产草量,加速培肥地力。 1963年自江苏省农科院引进早丰毛苕(即“吐库曼”毛苕)。据1963-74年在所内和关中各地鉴定、示范,比普通毛苕生长迅速,产草量高。现将鉴定和繁殖示范结果简结如下。 Mau Mau is our province cotton, early green fine manure. In the past to promote the varieties are mainly ordinary catfish, slow growth, late retreat, early winter, early spring grass production were lower, and from early April to early May the fastest growing, but there are some contradictions with the sowing date of cotton. Such as turning pressure period too close to the cotton sowing time, due to the decomposition of green manure produced a lot of carbon dioxide, asphyxiation cottonseed germination, lack of seedlings serious. Therefore, the urgent need of early breeding new varieties of high yield Mochi, in order to improve winter, early spring grass production, accelerate fertility. In 1963, Jiangsu Province Academy of Agricultural Sciences introduced early morning hair 苕 (“Tu Tu Man” 苕 苕). According to 1963-74 identification and demonstration throughout the country and around Guanzhong, it grew rapidly and produced more grass than the common cattail. The demonstration results of identification and breeding are summarized as follows.